Match the following

Match the following

Acidic or basic solutions in water conduct electricity as they produce hydrogen and hydroxide ions respectively.

The colour of caustic soda turns pink when phenolphthalein is added

Assertion : Salts are the products of an acid-base reaction. Reason : Salt may be acidic or basic.

Assertion : Phenolphthalein gives pink colour in basic solution. Reason : Phenolphthalein is a natural indicator.

Assertion : While dissolving an acid or base in water, the acids must always be added slowly to water with constant stirring.

Reason : Dissolving an acid on a base in water in highly exothermic reaction

To protect tooth decay we are advised to brush our teeth regularly. The nature of the tooth paste commonly used is

Plaster of Paris hardens by-

Bleaching powder gives smell of chlorine because it-

The pH of a solution is 4.0. What should be the change in the hydrogen ion concentration of the solution, if its pH is to increased to 5.0.

Bleaching powder is soluble in cold water giving a milky solution due to-

Antacids contain-

Sodium hydrogen-carbonate when added to acetic acid evolves a gas. Which of the following statements are true about the gas evolved?

(i) It turns lime water milky

(ii) It extinguishes a burning splinter

(iii) It dissolves in a solution of sodium hydroxide

(iv) It has a pungent odour

The acid used in making of vinegar is-

Acetic acid was added to a solid X kept in a test tube. A colourless and odourless gas was evolved. The gas was passed through lime water which turned milky. It was concluded that.

Solution turns red litmus blue, its pH is likely to be

Solution reacts with crushed-egg shells to give a gas that turns lime water milky. The solution contains

10 ml of a solution of NaOH is found to be completely neutralised by 8 mL of a given solution of HC1. If we take 20 mL of the same solution of NaOH, the amount of HC1 solution (the same solution as before) required to neutralise it will be

Equal pieces of zinc granules are dropped in four test tubes. Following substances are poured in all the four test tubes. The reaction will be vigorous with

Which of the following statements shows the property of an acid?

Two solutions X and Y were found to have pH value of 4 and 10 respectively. The inference that can be drawn is

A student was asked to collect apparatus from lab store, for doing experiment of pH of given sample. Identify the article which he is not supposed to pick.

Which one of the following would you need to identify the gas that evolve when you heat NaOH solution with zinc metal?

A solution has pH value of 5. On adding 10 mL of NaCl to it, what will be the pH of the new solution?

A salt is dissolved in water. The pH of this salt solution was found to be 7 by measuring the pH with a universal indicator paper. The salt is most likely to be

A student performed an experiment using zinc granules and . sodium carbonate with sodium hydroxide and hydrochloric acid under different conditions as shown below.

In Which Setup, No Gas is evolved?

Four setups as given below are arranged to identify the gas evolved when dilute hydrochloric acid was added to zinc granules. Which is the most appropriate set up?

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish orange. Which of the following would change the colour of this pH paper to greenish blue?